Loop vectorization methods and apparatus are disclosed. An example method includes prior to executing an original loop having iterations, analyzing, via a processor, the iterations of the original loop, identifying a dependency between a first one of the iterations of the original loop and a second one of the iterations of the original loop, after identifying the dependency, vectorizing a first group of the iterations of the original loop based on the identified dependency to form a vectorization loop, and setting a dynamic adjustment value of the vectorization loop based on the identified dependency.